]> git.baikalelectronics.ru Git - kernel.git/commit
vhost_net: conditionally enable tx polling
authorJason Wang <jasowang@redhat.com>
Mon, 13 Nov 2017 03:45:34 +0000 (11:45 +0800)
committerDavid S. Miller <davem@davemloft.net>
Wed, 15 Nov 2017 04:50:58 +0000 (13:50 +0900)
commit0af4afe43f47580fa85d8bfa649125032d096451
tree5e0b6f1b25d54e6bb4c57bf0ade726a01c330fbe
parent28d6a2069beec8152a028a90286d36470b0d25b6
vhost_net: conditionally enable tx polling

We always poll tx for socket, this is sub optimal since this will
slightly increase the waitqueue traversing time and more important,
vhost could not benefit from commit 2f011ab2910a ("net-tun:
restructure tun_do_read for better sleep/wakeup efficiency") even if
we've stopped rx polling during handle_rx(), tx poll were still left
in the waitqueue.

Pktgen from a remote host to VM over mlx4 on two 2.00GHz Xeon E5-2650
shows 11.7% improvements on rx PPS. (from 1.28Mpps to 1.44Mpps)

Cc: Wei Xu <wexu@redhat.com>
Cc: Matthew Rosato <mjrosato@linux.vnet.ibm.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/vhost/net.c